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// #################################################################################################
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// #################################################################################################
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// # << NEORV32: neorv32_uart.c - Universal Asynchronous Receiver/Transmitter (UART) HW Driver >> #
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// # << NEORV32: neorv32_uart.c - Universal Asynchronous Receiver/Transmitter (UART) HW Driver >> #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # BSD 3-Clause License #
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// # #
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// # #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # Copyright (c) 2022, Stephan Nolting. All rights reserved. #
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// # #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # permitted provided that the following conditions are met: #
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// # #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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/// \cond
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/// \cond
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// Private functions
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// Private functions
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static void __neorv32_uart_itoa(uint32_t x, char *res) __attribute__((unused)); // GCC: do not output a warning when this variable is unused
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static void __neorv32_uart_itoa(uint32_t x, char *res) __attribute__((unused)); // GCC: do not output a warning when this variable is unused
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static void __neorv32_uart_tohex(uint32_t x, char *res) __attribute__((unused)); // GCC: do not output a warning when this variable is unused
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static void __neorv32_uart_tohex(uint32_t x, char *res) __attribute__((unused)); // GCC: do not output a warning when this variable is unused
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static void __neorv32_uart_touppercase(uint32_t len, char *ptr) __attribute__((unused)); // GCC: do not output a warning when this variable is unused
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/// \endcond
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/// \endcond
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// #################################################################################################
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// #################################################################################################
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// Primary UART (UART0)
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// Primary UART (UART0)
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uint16_t i = 0; // BAUD rate divisor
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uint16_t i = 0; // BAUD rate divisor
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uint8_t p = 0; // initial prsc = CLK/2
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uint8_t p = 0; // initial prsc = CLK/2
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// raw clock prescaler
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// raw clock prescaler
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#ifndef make_bootloader
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#ifndef make_bootloader
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// use div instructions
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i = (uint16_t)(clock / (2*baudrate));
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i = (uint16_t)(clock / (2*baudrate));
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#else
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#else
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// division via repeated subtraction (minimal size, only for bootloader)
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// division via repeated subtraction (minimal size, only for bootloader)
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while (clock >= 2*baudrate) {
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while (clock >= 2*baudrate) {
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clock -= 2*baudrate;
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clock -= 2*baudrate;
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* @param[in] format Pointer to format string.
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* @param[in] format Pointer to format string.
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*
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*
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* <TABLE>
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* <TABLE>
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* <TR><TD>%s</TD><TD>String (array of chars, zero-terminated)</TD></TR>
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* <TR><TD>%s</TD><TD>String (array of chars, zero-terminated)</TD></TR>
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* <TR><TD>%c</TD><TD>Single char</TD></TR>
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* <TR><TD>%c</TD><TD>Single char</TD></TR>
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* <TR><TD>%i</TD><TD>32-bit signed number, printed as decimal</TD></TR>
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* <TR><TD>%d/%i</TD><TD>32-bit signed number, printed as decimal</TD></TR>
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* <TR><TD>%u</TD><TD>32-bit unsigned number, printed as decimal</TD></TR>
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* <TR><TD>%u</TD><TD>32-bit unsigned number, printed as decimal</TD></TR>
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* <TR><TD>%x</TD><TD>32-bit number, printed as 8-char hexadecimal</TD></TR>
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* <TR><TD>%x</TD><TD>32-bit number, printed as 8-char hexadecimal - lower-case</TD></TR>
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* <TR><TD>%X</TD><TD>32-bit number, printed as 8-char hexadecimal - upper-case</TD></TR>
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* <TR><TD>%p</TD><TD>32-bit pointer, printed as 8-char hexadecimal - lower-case</TD></TR>
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* </TABLE>
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* </TABLE>
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**************************************************************************/
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**************************************************************************/
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void neorv32_uart0_printf(const char *format, ...) {
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void neorv32_uart0_printf(const char *format, ...) {
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char c, string_buf[11];
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char c, string_buf[11];
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break;
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break;
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case 'c': // char
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case 'c': // char
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neorv32_uart0_putc((char)va_arg(a, int));
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neorv32_uart0_putc((char)va_arg(a, int));
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break;
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break;
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case 'i': // 32-bit signed
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case 'i': // 32-bit signed
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case 'd':
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n = (int32_t)va_arg(a, int32_t);
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n = (int32_t)va_arg(a, int32_t);
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if (n < 0) {
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if (n < 0) {
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n = -n;
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n = -n;
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neorv32_uart0_putc('-');
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neorv32_uart0_putc('-');
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}
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}
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case 'u': // 32-bit unsigned
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case 'u': // 32-bit unsigned
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__neorv32_uart_itoa(va_arg(a, uint32_t), string_buf);
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__neorv32_uart_itoa(va_arg(a, uint32_t), string_buf);
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neorv32_uart0_print(string_buf);
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neorv32_uart0_print(string_buf);
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break;
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break;
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case 'x': // 32-bit hexadecimal
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case 'x': // 32-bit hexadecimal
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case 'p':
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case 'X':
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__neorv32_uart_tohex(va_arg(a, uint32_t), string_buf);
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__neorv32_uart_tohex(va_arg(a, uint32_t), string_buf);
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if (c == 'X') {
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__neorv32_uart_touppercase(11, string_buf);
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}
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neorv32_uart0_print(string_buf);
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neorv32_uart0_print(string_buf);
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break;
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break;
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default: // unsupported format
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default: // unsupported format
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neorv32_uart0_putc('%');
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neorv32_uart0_putc('%');
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neorv32_uart0_putc(c);
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neorv32_uart0_putc(c);
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uint32_t clock = NEORV32_SYSINFO.CLK;
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uint32_t clock = NEORV32_SYSINFO.CLK;
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uint16_t i = 0; // BAUD rate divisor
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uint16_t i = 0; // BAUD rate divisor
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uint8_t p = 0; // initial prsc = CLK/2
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uint8_t p = 0; // initial prsc = CLK/2
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// raw clock prescaler
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// raw clock prescaler
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#ifdef make_bootloader
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#ifndef make_bootloader
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// use div instructions
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// use div instructions
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i = (uint16_t)(clock / (2*baudrate));
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i = (uint16_t)(clock / (2*baudrate));
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#else
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#else
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// division via repeated subtraction (minimal size, only for bootloader)
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// division via repeated subtraction (minimal size, only for bootloader)
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while (clock >= 2*baudrate) {
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while (clock >= 2*baudrate) {
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* @param[in] format Pointer to format string.
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* @param[in] format Pointer to format string.
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*
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*
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* <TABLE>
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* <TABLE>
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* <TR><TD>%s</TD><TD>String (array of chars, zero-terminated)</TD></TR>
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* <TR><TD>%s</TD><TD>String (array of chars, zero-terminated)</TD></TR>
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* <TR><TD>%c</TD><TD>Single char</TD></TR>
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* <TR><TD>%c</TD><TD>Single char</TD></TR>
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* <TR><TD>%i</TD><TD>32-bit signed number, printed as decimal</TD></TR>
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* <TR><TD>%d/%i</TD><TD>32-bit signed number, printed as decimal</TD></TR>
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* <TR><TD>%u</TD><TD>32-bit unsigned number, printed as decimal</TD></TR>
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* <TR><TD>%u</TD><TD>32-bit unsigned number, printed as decimal</TD></TR>
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* <TR><TD>%x</TD><TD>32-bit number, printed as 8-char hexadecimal</TD></TR>
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* <TR><TD>%x</TD><TD>32-bit number, printed as 8-char hexadecimal - lower-case</TD></TR>
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* <TR><TD>%X</TD><TD>32-bit number, printed as 8-char hexadecimal - upper-case</TD></TR>
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* <TR><TD>%p</TD><TD>32-bit pointer, printed as 8-char hexadecimal - lower-case</TD></TR>
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* </TABLE>
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* </TABLE>
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**************************************************************************/
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**************************************************************************/
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void neorv32_uart1_printf(const char *format, ...) {
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void neorv32_uart1_printf(const char *format, ...) {
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char c, string_buf[11];
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char c, string_buf[11];
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break;
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break;
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case 'c': // char
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case 'c': // char
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neorv32_uart1_putc((char)va_arg(a, int));
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neorv32_uart1_putc((char)va_arg(a, int));
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break;
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break;
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case 'i': // 32-bit signed
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case 'i': // 32-bit signed
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case 'd':
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n = (int32_t)va_arg(a, int32_t);
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n = (int32_t)va_arg(a, int32_t);
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if (n < 0) {
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if (n < 0) {
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n = -n;
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n = -n;
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neorv32_uart1_putc('-');
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neorv32_uart1_putc('-');
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}
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}
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case 'u': // 32-bit unsigned
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case 'u': // 32-bit unsigned
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__neorv32_uart_itoa(va_arg(a, uint32_t), string_buf);
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__neorv32_uart_itoa(va_arg(a, uint32_t), string_buf);
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neorv32_uart1_print(string_buf);
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neorv32_uart1_print(string_buf);
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break;
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break;
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case 'x': // 32-bit hexadecimal
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case 'x': // 32-bit hexadecimal
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case 'p':
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case 'X':
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__neorv32_uart_tohex(va_arg(a, uint32_t), string_buf);
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__neorv32_uart_tohex(va_arg(a, uint32_t), string_buf);
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if (c == 'X') {
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__neorv32_uart_touppercase(11, string_buf);
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}
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neorv32_uart1_print(string_buf);
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neorv32_uart1_print(string_buf);
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break;
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break;
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default: // unsupported format
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default: // unsupported format
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neorv32_uart1_putc('%');
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neorv32_uart1_putc('%');
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neorv32_uart1_putc(c);
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neorv32_uart1_putc(c);
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Line 870... |
}
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}
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res[8] = '\0'; // terminate result string
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res[8] = '\0'; // terminate result string
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}
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}
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No newline at end of file
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No newline at end of file
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/**********************************************************************//**
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* Private function to cast a string to UPPERCASE.
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*
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* @param[in] len Total length of input string.
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* @param[in,out] ptr Pointer for input/output string.
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**************************************************************************/
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static void __neorv32_uart_touppercase(uint32_t len, char *ptr) {
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char tmp;
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while (len > 0) {
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tmp = *ptr;
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if ((tmp >= 'a') && (tmp <= 'z')) {
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*ptr = tmp - 32;
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}
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ptr++;
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len--;
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}
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}
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No newline at end of file
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No newline at end of file
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